Hierarchical DWT-Based Optimal Diversity Power Allocation for Video Transmission in OFDMA/MIMO Wireless Systems
Source: Inderscience Enterprises
In this paper, the authors propose novel algorithms for optimal power allocation towards video transmission in Orthogonal Frequency Division Multiple Access (OFDMA) and Multiple-Input Multiple-Output (MIMO)-based 4G networks. A unique feature of the schemes is that they employ diversity dependent subcarrier power distribution relying on a Discrete Wavelet Transform (DWT)-based hierarchical video decomposition, with exclusively order statistics-based partial Channel State Information (CSI). This is formulated as a convex minimisation problem and closed form expressions are derived for diversity-based optimal power allocation. They also propose novel algorithms for diversity order-based optimal power allocation for video transmission in MIMO systems.